/*
 * Copyright 2013 Twitter Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.twitter.storehaus.testing

import scala.collection.mutable.{ HashSet, SynchronizedSet }
import scala.util.control.Exception.allCatch

trait Cleanup {
  Cleanup.instances += this
  def cleanup(): Unit
}

/** object resolved dynamically by sbt during test cleanup  */
object Cleanup {
  private val instances = new HashSet[Cleanup] with SynchronizedSet[Cleanup]
  /** Clean up all instances capturing ( and logging ) errors */
  def cleanup() {
    instances.map(c => allCatch.either(c.cleanup()).left.map((c, _))).map(_.fold({
      case (closeable, error) => println("failed to cleanup %s: %s".format(closeable, error.getMessage))
    }, identity))
  }
}
